Oh, you mean -that- kind of thing.
In live version, games vs maxim spammers end if the enemy managed to hold enough to get a T-70 out. This kind of strategy should be a lot more difficult to pull off in WBP.
Partisans and rushing to a t34 now.
And t70 still beats 222 and luchs, so might still use it for that+support maxims.
I felt little impact from WBP on the maximspam.